Examples of org.apache.hadoop.hdfs.server.namenode.snapshot.DirectoryWithSnapshotFeature

Package org.apache.hadoop.hdfs.server.namenode.snapshot

Examples of org.apache.hadoop.hdfs.server.namenode.snapshot.DirectoryWithSnapshotFeature

org.apache.hadoop.hdfs.server.namenode.snapshot.DirectoryWithSnapshotFeature
Feature for directory with snapshot-related information.

    if (latestSnapshotId == Snapshot.CURRENT_STATE_ID) {
      return child;
    }
    
    // add snapshot feature if necessary
    DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
    if (sf == null) {
      sf = this.addSnapshotFeature(null);
    }
    return sf.saveChild2Snapshot(this, child, latestSnapshotId, snapshotCopy);
  }

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   *          from the corresponding snapshot; otherwise, get the result from
   *          the current directory.
   * @return the child inode.
   */
  public INode getChild(byte[] name, int snapshotId) {
    DirectoryWithSnapshotFeature sf;
    if (snapshotId == Snapshot.CURRENT_STATE_ID || 
        (sf = getDirectoryWithSnapshotFeature()) == null) {
      ReadOnlyList<INode> c = getCurrentChildrenList();
      final int i = ReadOnlyList.Util.binarySearch(c, name);
      return i < 0 ? null : c.get(i);
    }
    
    return sf.getChild(this, name, snapshotId);
  }

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   * @return the current children list if the specified snapshot is null;
   *         otherwise, return the children list corresponding to the snapshot.
   *         Note that the returned list is never null.
   */
  public ReadOnlyList<INode> getChildrenList(final int snapshotId) {
    DirectoryWithSnapshotFeature sf;
    if (snapshotId == Snapshot.CURRENT_STATE_ID
        || (sf = this.getDirectoryWithSnapshotFeature()) == null) {
      return getCurrentChildrenList();
    }
    return sf.getChildrenList(this, snapshotId);
  }

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   */
  public boolean removeChild(INode child, int latestSnapshotId)
      throws QuotaExceededException {
    if (isInLatestSnapshot(latestSnapshotId)) {
      // create snapshot feature if necessary
      DirectoryWithSnapshotFeature sf = this.getDirectoryWithSnapshotFeature();
      if (sf == null) {
        sf = this.addSnapshotFeature(null);
      }
      return sf.removeChild(this, child, latestSnapshotId);
    }
    return removeChild(child);
  }

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      return false;
    }


    if (isInLatestSnapshot(latestSnapshotId)) {
      // create snapshot feature if necessary
      DirectoryWithSnapshotFeature sf = this.getDirectoryWithSnapshotFeature();
      if (sf == null) {
        sf = this.addSnapshotFeature(null);
      }
      return sf.addChild(this, node, setModTime, latestSnapshotId);
    }
    addChild(node, low);
    if (setModTime) {
      // update modification time of the parent directory
      updateModificationTime(node.getModificationTime(), latestSnapshotId);

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  }


  @Override
  public Quota.Counts computeQuotaUsage(Quota.Counts counts, boolean useCache,
      int lastSnapshotId) {
    final DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
    
    // we are computing the quota usage for a specific snapshot here, i.e., the
    // computation only includes files/directories that exist at the time of the
    // given snapshot
    if (sf != null && lastSnapshotId != Snapshot.CURRENT_STATE_ID

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  /** Add quota usage for this inode excluding children. */
  public Quota.Counts computeQuotaUsage4CurrentDirectory(Quota.Counts counts) {
    counts.add(Quota.NAMESPACE, 1);
    // include the diff list
    DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
    if (sf != null) {
      sf.computeQuotaUsage4CurrentDirectory(counts);
    }
    return counts;
  }

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  }


  @Override
  public ContentSummaryComputationContext computeContentSummary(
      ContentSummaryComputationContext summary) {
    final DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
    if (sf != null) {
      sf.computeContentSummary4Snapshot(summary.getCounts());
    }
    final DirectoryWithQuotaFeature q = getDirectoryWithQuotaFeature();
    if (q != null) {
      return q.computeContentSummary(this, summary);
    } else {

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   *          The node to be added back
   * @throws QuotaExceededException should not throw this exception
   */
  public void undoRename4ScrParent(final INodeReference oldChild,
      final INode newChild) throws QuotaExceededException {
    DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
    Preconditions.checkState(sf != null,
        "Directory does not have snapshot feature");
    sf.getDiffs().removeChild(ListType.DELETED, oldChild);
    sf.getDiffs().replaceChild(ListType.CREATED, oldChild, newChild);
    addChild(newChild, true, Snapshot.CURRENT_STATE_ID);
  }

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   * (with OVERWRITE option) removes a file/dir from the dst tree, add it back
   * and delete possible record in the deleted list.  
   */
  public void undoRename4DstParent(final INode deletedChild,
      int latestSnapshotId) throws QuotaExceededException {
    DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
    Preconditions.checkState(sf != null,
        "Directory does not have snapshot feature");
    boolean removeDeletedChild = sf.getDiffs().removeChild(ListType.DELETED,
        deletedChild);
    int sid = removeDeletedChild ? Snapshot.CURRENT_STATE_ID : latestSnapshotId;
    final boolean added = addChild(deletedChild, true, sid);
    // update quota usage if adding is successfully and the old child has not
    // been stored in deleted list before

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